X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/6bda628718f67c04ed43e8328f55bdce5319c504..6e7fc21a94f29e09b4bdce7c17cade5b1322bc7d:/Projects/AVRISP-MKII/Lib/XPROG/TINYNVM.c diff --git a/Projects/AVRISP-MKII/Lib/XPROG/TINYNVM.c b/Projects/AVRISP-MKII/Lib/XPROG/TINYNVM.c index d45e42a1a..891ae8d14 100644 --- a/Projects/AVRISP-MKII/Lib/XPROG/TINYNVM.c +++ b/Projects/AVRISP-MKII/Lib/XPROG/TINYNVM.c @@ -1,21 +1,21 @@ /* LUFA Library - Copyright (C) Dean Camera, 2010. - + Copyright (C) Dean Camera, 2011. + dean [at] fourwalledcubicle [dot] com - www.fourwalledcubicle.com + www.lufa-lib.org */ /* - Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com) + Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com) - Permission to use, copy, modify, distribute, and sell this + Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted - without fee, provided that the above copyright notice appear in + without fee, provided that the above copyright notice appear in all copies and that both that the copyright notice and this - permission notice and warranty disclaimer appear in supporting - documentation, and that the name of the author not be used in - advertising or publicity pertaining to distribution of the + permission notice and warranty disclaimer appear in supporting + documentation, and that the name of the author not be used in + advertising or publicity pertaining to distribution of the software without specific, written prior permission. The author disclaim all warranties with regard to this @@ -43,9 +43,9 @@ static void TINYNVM_SendPointerAddress(const uint16_t AbsoluteAddress) { /* Send the given 16-bit address to the target, LSB first */ XPROGTarget_SendByte(TPI_CMD_SSTPR | 0); - XPROGTarget_SendByte(((uint8_t*)&AbsoluteAddress)[0]); + XPROGTarget_SendByte(AbsoluteAddress & 0xFF); XPROGTarget_SendByte(TPI_CMD_SSTPR | 1); - XPROGTarget_SendByte(((uint8_t*)&AbsoluteAddress)[1]); + XPROGTarget_SendByte(AbsoluteAddress >> 8); } /** Sends a SIN command to the target with the specified I/O address, ready for the data byte to be written. @@ -85,7 +85,7 @@ bool TINYNVM_WaitWhileNVMBusBusy(void) uint8_t StatusRegister = XPROGTarget_ReceiveByte(); /* We might have timed out waiting for the status register read response, check here */ - if (!(TimeoutTicksRemaining)) + if (TimeoutExpired) return false; /* Check the status register read response to see if the NVM bus is enabled */ @@ -110,7 +110,7 @@ bool TINYNVM_WaitWhileNVMControllerBusy(void) uint8_t StatusRegister = XPROGTarget_ReceiveByte(); /* We might have timed out waiting for the status register read response, check here */ - if (!(TimeoutTicksRemaining)) + if (TimeoutExpired) return false; /* Check to see if the BUSY flag is still set */ @@ -119,6 +119,40 @@ bool TINYNVM_WaitWhileNVMControllerBusy(void) } } +/** Enables the physical TPI interface on the target and enables access to the internal NVM controller. + * + * \return Boolean true if the TPI interface was enabled successfully, false otherwise + */ +bool TINYNVM_EnableTPI(void) +{ + /* Enable TPI programming mode with the attached target */ + XPROGTarget_EnableTargetTPI(); + + /* Lower direction change guard time to 0 USART bits */ + XPROGTarget_SendByte(TPI_CMD_SSTCS | TPI_CTRL_REG); + XPROGTarget_SendByte(0x07); + + /* Enable access to the XPROG NVM bus by sending the documented NVM access key to the device */ + XPROGTarget_SendByte(TPI_CMD_SKEY); + for (uint8_t i = sizeof(TPI_NVMENABLE_KEY); i > 0; i--) + XPROGTarget_SendByte(TPI_NVMENABLE_KEY[i - 1]); + + /* Wait until the NVM bus becomes active */ + return TINYNVM_WaitWhileNVMBusBusy(); +} + +/** Removes access to the target's NVM controller and physically disables the target's physical TPI interface. */ +void TINYNVM_DisableTPI(void) +{ + TINYNVM_WaitWhileNVMBusBusy(); + + /* Clear the NVMEN bit in the TPI STATUS register to disable TPI mode */ + XPROGTarget_SendByte(TPI_CMD_SSTCS | TPI_STATUS_REG); + XPROGTarget_SendByte(0x00); + + XPROGTarget_DisableTargetTPI(); +} + /** Reads memory from the target's memory spaces. * * \param[in] ReadAddress Start address to read from within the target's address space @@ -138,18 +172,18 @@ bool TINYNVM_ReadMemory(const uint16_t ReadAddress, /* Set the NVM control register to the NO OP command for memory reading */ TINYNVM_SendWriteNVMRegister(XPROG_Param_NVMCMDRegAddr); XPROGTarget_SendByte(TINY_NVM_CMD_NOOP); - + /* Send the address of the location to read from */ TINYNVM_SendPointerAddress(ReadAddress); - - while (ReadSize-- && TimeoutTicksRemaining) + + while (ReadSize-- && !(TimeoutExpired)) { /* Read the byte of data from the target */ XPROGTarget_SendByte(TPI_CMD_SLD | TPI_POINTER_INDIRECT_PI); *(ReadBuffer++) = XPROGTarget_ReceiveByte(); } - - return (TimeoutTicksRemaining != 0); + + return (TimeoutExpired == false); } /** Writes word addressed memory to the target's memory spaces. @@ -167,7 +201,7 @@ bool TINYNVM_WriteMemory(const uint16_t WriteAddress, /* Wait until the NVM controller is no longer busy */ if (!(TINYNVM_WaitWhileNVMControllerBusy())) return false; - + /* Must have an integer number of words to write - if extra byte, word-align via a dummy high byte */ if (WriteLength & 0x01) WriteBuffer[WriteLength++] = 0xFF; @@ -175,10 +209,10 @@ bool TINYNVM_WriteMemory(const uint16_t WriteAddress, /* Set the NVM control register to the WORD WRITE command for memory reading */ TINYNVM_SendWriteNVMRegister(XPROG_Param_NVMCMDRegAddr); XPROGTarget_SendByte(TINY_NVM_CMD_WORDWRITE); - + /* Send the address of the location to write to */ TINYNVM_SendPointerAddress(WriteAddress); - + while (WriteLength) { /* Wait until the NVM controller is no longer busy */ @@ -188,7 +222,7 @@ bool TINYNVM_WriteMemory(const uint16_t WriteAddress, /* Write the low byte of data to the target */ XPROGTarget_SendByte(TPI_CMD_SST | TPI_POINTER_INDIRECT_PI); XPROGTarget_SendByte(*(WriteBuffer++)); - + /* Write the high byte of data to the target */ XPROGTarget_SendByte(TPI_CMD_SST | TPI_POINTER_INDIRECT_PI); XPROGTarget_SendByte(*(WriteBuffer++)); @@ -196,7 +230,7 @@ bool TINYNVM_WriteMemory(const uint16_t WriteAddress, /* Need to decrement the write length twice, since we read out a whole word */ WriteLength -= 2; } - + return true; } @@ -226,8 +260,9 @@ bool TINYNVM_EraseMemory(const uint8_t EraseCommand, /* Wait until the NVM controller is no longer busy */ if (!(TINYNVM_WaitWhileNVMControllerBusy())) return false; - + return true; } #endif +